diff --git a/examples/animation/movie_demo_sgskip.py b/examples/animation/movie_demo_sgskip.py
index 32424f9a0898..c729ba52c05e 100644
--- a/examples/animation/movie_demo_sgskip.py
+++ b/examples/animation/movie_demo_sgskip.py
@@ -7,6 +7,7 @@
 
 from __future__ import print_function
 
+import os
 import subprocess
 import matplotlib.pyplot as plt
 import numpy as np